Abstract: A mooring system for a semi-submersible platform includes buoyancy structures for providing buoyancy to the semi-submersible platform, mooring lines connected to the buoyancy structures, and anchors embedded in the sea floor that are connected to the mooring lines. At least one-half of the mooring lines are attached to one of the buoyancy structures. A ballast control system for a wind turbine platform includes a sensor that is configured to detect a rotation of a wind turbine and a controller that is configured to direct a transfer of ballast to correct the of the wind turbine.

Abstract: A floating wind turbine platform includes a floatation frame that includes at least three columns that are coupled to each other with horizontal main beams. A wind turbine tower is mounted above a tower support column to simplify the system construction and improve the structural strength. The turbine blades are coupled to a nacelle that rotates on top of the tower. The turbine's gearbox generator and other electrical gear can be mounted either traditionally in the nacelle, or lower in the tower or in the top of the tower-supporting column. The floatation frame includes a water ballasting system that pumps water between the columns to keep the tower in a vertical alignment regardless of the wind speed. Water-entrapment plates are mounted to the bottoms of the columns to minimize the rotational movement of the floatation frame due to waves.

Abstract: A floating wind turbine platform includes a floatation frame (105) that includes three columns (102, 103) that are coupled to each other with horizontal main beams (115). A wind turbine tower (111) is mounted above a tower support column (102) to simplify the system construction and improve the structural strength. The turbine blades (101) are coupled to a nacelle (125) that rotates on top of the tower (111). The turbine's gearbox generator and other electrical gear can be mounted either traditionally in the nacelle, or lower in the tower (111) or in the top of the tower-supporting column (102). The floatation frame (105) includes a water ballasting system that pumps water between the columns (102, 103) to keep the tower (111) in a 10 vertical alignment regardless of the wind speed. Water-entrapment plates (107) are mounted to the bottoms of the columns (102, 103) to minimize the rotational movement of the floatation frame (105) due to waves.